Control system arrangement structure for boron-phosphorus co-doping in optical fiber rod manufacturing

Abstract

The utility model belongs to the technical field of special optical fiber manufacturing, and particularly relates to a control system arrangement structure for boron-phosphorus co-doping in optical fiber rod manufacturing. Through reasonable arrangement of the boron-doped pipeline, the phosphorus-doped pipeline, the boron-phosphorus co-doped pipeline, the purging pipeline and the gas inlet and outlet pipeline and in cooperation with the arrangement of the mass flow controller and a plurality of control valves, the overall structure is simple, the operation is convenient, and the flow of the boron-doped pipeline and the phosphorus-doped pipeline can be efficiently and conveniently adjusted; and pipeline pollution caused by gas blow-by can be effectively avoided, overhaul and maintenance are convenient, an operator can conveniently and rapidly check problems, and pipeline safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of special optical fiber manufacturing, and particularly relates to a control system layout structure for co-doping boron and phosphorus in optical fiber preform manufacturing. Background Art

[0002] Doped special optical fibers have been widely used in optical fiber lasers, amplifiers, and sensors, and have witnessed significant development in recent years. Optical fiber doping specifically refers to the process of doping phosphorus and boron at specified layers during the deposition of optical fiber preforms.

[0003] In the existing optical fiber doping process, usually only phosphorus raw material or boron raw material is doped alone. Single doping does not involve the mutual influence between the two raw materials, and there will be no situation of gas leakage between pipelines causing mutual contamination of pipelines. However, the existing technology lacks a pipeline monitoring scheme for co-doping boron and phosphorus, making it difficult to meet the requirements of the co-doping process of boron and phosphorus during optical fiber preform manufacturing. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a control system layout structure for co-doping boron and phosphorus in optical fiber preform manufacturing, which has a simple overall structure, is convenient for installation and maintenance, can conveniently adjust the flow rates of the boron-doping pipeline and the phosphorus-doping pipeline, and can effectively avoid pipeline contamination caused by mutual gas leakage.

[0005] The technical solution adopted by the utility model to solve the above technical problem is as follows:

[0006] A control system layout structure for co-doping boron and phosphorus in optical fiber preform manufacturing includes a boron raw material tank 1, a phosphorus raw material tank 2, and an electric control cabinet 19. The input ends of a boron-doping pipeline 10 and a phosphorus-doping pipeline 11 are respectively connected to the boron raw material tank 1 and the phosphorus raw material tank 2. The output ends of the boron-doping pipeline 10 and the phosphorus-doping pipeline 11 are both connected to the input end of a boron-phosphorus co-doping pipeline 12. The output end of the boron-phosphorus co-doping pipeline 12 is connected to the glass liner of the optical fiber preform manufacturing process. A boron pipeline mass flow controller 3 and a boron-doping pipeline control valve 5 are sequentially arranged on the boron-doping pipeline 10. A phosphorus pipeline mass flow controller 4 and a phosphorus-doping pipeline control valve 6 are sequentially arranged on the phosphorus-doping pipeline 11. A boron-phosphorus co-doping pipeline control valve 7 is arranged on the boron-phosphorus co-doping pipeline 12. The boron pipeline mass flow controller 3, the phosphorus pipeline mass flow controller 4, the boron-doping pipeline control valve 5, the phosphorus-doping pipeline control valve 6, and the boron-phosphorus co-doping pipeline control valve 7 are all electrically connected to the controller in the electric control cabinet 19 through signal lines.

[0007] Preferably, corresponding pipeline heating devices and temperature sensors are installed on the boron-doping pipeline 10, the phosphorus-doping pipeline 11, and the boron-phosphorus co-doping pipeline 12. The pipeline heating device is specifically a heating resistance wire wrapped around the outside of the pipeline.

[0008] Preferably, the input end of a boron purge pipeline 13 is connected to the boron-doped pipeline 10; the input end of a phosphorus purge pipeline 14 is connected to the phosphorus-doped pipeline 11.

[0009] Preferably, a pneumatic valve 8 for the boron purge pipeline and a pneumatic valve 9 for the phosphorus purge pipeline are respectively arranged on the boron purge pipeline 13 and the phosphorus purge pipeline 14.

[0010] Preferably, the air inlet ends of the boron raw material tank 1 and the phosphorus raw material tank 2 are respectively connected to an air inlet pipeline 15 and an air inlet pipeline 16, and the air inlet pipeline 15 and the air inlet pipeline 16 are respectively connected to the carrier gas source devices corresponding to boron vapor and phosphorus vapor;

[0011] The output ends of the boron purge pipeline 13 and the phosphorus purge pipeline 14 are respectively connected to an air outlet pipeline 17 and an air outlet pipeline 18, and both the air outlet pipeline 17 and the air outlet pipeline 18 are connected to an exhaust gas pumping device.

[0012] Preferably, the control valves 5 for the boron-doped pipeline, the control valves 6 for the phosphorus-doped pipeline, and the control valves 7 for the boron-phosphorus co-doping pipeline are all normally closed valves.

[0013] Preferably, the pneumatic valve 8 for the boron purge pipeline and the pneumatic valve 9 for the phosphorus purge pipeline are all normally open valves.

[0014] Preferably, the pneumatic valve 8 for the boron purge pipeline, the pneumatic valve 9 for the phosphorus purge pipeline, the pipeline heating device, and the temperature sensor are all electrically connected to a controller in the electric control cabinet 19.

[0015] The present utility model has the following main advantages compared with the prior art:

[0016] The present utility model provides a control system layout structure for boron-phosphorus co-doping in optical fiber preform manufacturing. Through the reasonable layout of the boron-doped pipeline, the phosphorus-doped pipeline, the boron-phosphorus co-doping pipeline, the purge pipeline, and the inlet and outlet pipelines, and in cooperation with the setting of the mass flow controller and multiple control valves, the overall structure is simple and the operation is convenient, and it can efficiently and conveniently adjust the flow rates of the boron-doped pipeline and the phosphorus-doped pipeline; moreover, the present utility model can effectively avoid pipeline contamination caused by gas leakage between each other, is convenient for overhaul and maintenance, can facilitate the operator to quickly troubleshoot problems, and ensure the pipeline safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall layout structure of the boron-phosphorus co-doping control system in the embodiment of the present utility model.

[0018] In the figure: 1 - boron raw material tank; 2 - phosphorus raw material tank; 3 - boron pipeline mass flow controller (boron MFC); 4 - phosphorus pipeline mass flow controller (phosphorus MFC); 5 - boron doping pipeline control valve; 6 - phosphorus doping pipeline control valve; 7 - boron and phosphorus co-doping pipeline control valve; 8 - boron purge pipeline pneumatic valve; 9 - phosphorus purge pipeline pneumatic valve; 10 - boron doping pipeline; 11 - phosphorus doping pipeline; 12 - boron and phosphorus co-doping pipeline; 13 - boron purge pipeline; 14 - phosphorus purge pipeline; 15 - intake pipeline one; 16 - intake pipeline two; 17 - outlet pipeline one; 18 - outlet pipeline two; 19 - electric control cabinet. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0021] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0023] The features and performance of the present application will be further described in detail below in conjunction with the embodiments.

[0024] As Figure 1As shown in the figure, the present application provides a control system layout structure for boron and phosphorus co-doping in optical fiber preform manufacturing, specifically including a boron raw material tank 1, a phosphorus raw material tank 2, and an electric control cabinet 19. The input ends of a boron doping pipeline 10 and a phosphorus doping pipeline 11 are respectively connected to the boron raw material tank 1 and the phosphorus raw material tank 2. The output ends of the boron doping pipeline 10 and the phosphorus doping pipeline 11 are both connected to the input end of a boron and phosphorus co-doping pipeline 12. The output end of the boron and phosphorus co-doping pipeline 12 is connected to the glass liner of the optical fiber preform manufacturing process.

[0025] Among them, a boron pipeline mass flow controller 3 (for controlling the boron vapor flow rate) and a boron doping pipeline control valve 5 (for opening during the boron doping process) are sequentially arranged on the boron doping pipeline 10. A phosphorus pipeline mass flow controller 4 (for controlling the phosphorus vapor flow rate) and a phosphorus doping pipeline control valve 6 (for opening during the phosphorus doping process) are sequentially arranged on the phosphorus doping pipeline 11. A boron and phosphorus co-doping pipeline control valve 7 (for opening during single phosphorus doping, single boron doping, or mixed doping) is arranged on the boron and phosphorus co-doping pipeline 12.

[0026] Furthermore, corresponding pipeline heating devices and temperature sensors (for heating the pipeline and monitoring the pipeline temperature) are installed on the boron doping pipeline 10, the phosphorus doping pipeline 11, and the boron and phosphorus co-doping pipeline 12. The pipeline heating device is specifically a heating resistance wire wrapped around the outside of the pipeline.

[0027] Furthermore, the part of the boron doping pipeline 10 between the boron pipeline mass flow controller 3 and the boron doping pipeline control valve 5 is connected to the input end of a boron purge pipeline 13.

[0028] The part of the phosphorus doping pipeline 11 between the phosphorus pipeline mass flow controller 4 and the phosphorus doping pipeline control valve 6 is connected to the input end of a phosphorus purge pipeline 14.

[0029] The boron purge pipeline 13 and the phosphorus purge pipeline 14 are used to purge the residual corrosive raw materials in the boron doping / phosphorus doping pipeline after production to prevent the corrosive raw materials from staying in the pipeline for a long time.

[0030] Among them, a boron purge pipeline pneumatic valve 8 (for opening during purging the boron doping pipeline) and a phosphorus purge pipeline pneumatic valve 9 (for opening during purging the phosphorus doping pipeline) are respectively arranged in the middle of the boron purge pipeline 13 and the phosphorus purge pipeline 14.

[0031] Furthermore, the intake ends of the boron raw material tank 1 and the phosphorus raw material tank 2 are respectively connected to an intake pipeline one 15 and an intake pipeline two 16. The output ends of the boron purge pipeline 13 and the phosphorus purge pipeline 14 are respectively connected to an outlet pipeline one 17 and an outlet pipeline two 18.

[0032] Among them, the first intake pipe 15 and the second intake pipe 16 are respectively connected to the carrier gas source device of boron / phosphorus vapor. After the carrier gas source enters the corresponding boron / phosphorus raw material tank through the intake pipe, it carries the boron / phosphorus raw material to form the corresponding boron / phosphorus vapor and outputs it to the corresponding boron / phosphorus doping pipe.

[0033] The first exhaust pipe 17 and the second exhaust pipe 18 are both connected to the waste gas exhaust device, and the waste gas exhaust device is used to exhaust and collect the residual corrosive raw materials in the pipe for subsequent centralized treatment.

[0034] Further, the boron doping pipe control valve 5, the phosphorus doping pipe control valve 6, and the boron-phosphorus co-doping pipe control valve 7 are all normally closed valves.

[0035] Further, the boron purge pipe pneumatic valve 8 and the phosphorus purge pipe pneumatic valve 9 are all normally open valves.

[0036] Further, the boron pipe mass flow controller 3, the phosphorus pipe mass flow controller 4, the boron doping pipe control valve 5, the phosphorus doping pipe control valve 6, and the boron-phosphorus co-doping pipe control valve 7 are all electrically connected to the controller in the electric control cabinet 19 through signal lines.

[0037] The specific working principle is as follows:

[0038] The user can customize the start layer and end layer of phosphorus doping and boron doping on the operation interface of the electric control cabinet, and customize the flow rates of phosphorus doping and boron doping to achieve precise control of the process.

[0039] By receiving the instructions from the controller in the electric control cabinet 19 through the boron doping pipe control valve 5, the phosphorus doping pipe control valve 6, and the boron-phosphorus co-doping pipe control valve 7, and then respectively controlling the opening and closing of the boron doping pipe 10, the phosphorus doping pipe 11, and the boron-phosphorus co-doping pipe 12, it is possible to switch between the single boron doping process, the single phosphorus doping process, and the boron-phosphorus co-doping process according to requirements, and effectively avoid gas leakage between pipes;

[0040] Through the settings of the boron pipe mass flow controller (boron MFC) and the phosphorus pipe mass flow controller (phosphorus MFC), combined with the control instructions of the controller in the electric control cabinet 19, it is possible to accurately control the flow rates of boron / phosphorus vapor in the boron doping pipe 10 and the phosphorus doping pipe 11 in real time;

[0041] By installing corresponding pipe heating devices and temperature sensors on the boron doping pipe 10, the phosphorus doping pipe 11, and the boron-phosphorus co-doping pipe 12, it is possible to monitor the temperature values of each pipe in real time to ensure that the temperature values of each pipe are within the preset range during the process execution;

[0042] By setting up the boron purge pipeline 13 and the phosphorus purge pipeline 14 and coordinating the opening and closing of the pneumatic valve 8 of the boron purge pipeline and the pneumatic valve 9 of the phosphorus purge pipeline, it is possible to respectively purge and clean the boron / phosphorus pipelines after the process is completed, effectively preventing residual contamination in the pipelines;

[0043] At the same time, through the interlock control of the temperature sensor and the corresponding pipeline control valve, the temperature sensor sends the temperature value of the corresponding pipeline to the controller in real time. When the actual pipeline temperature exceeds the preset range, the controller can issue an instruction to the pipeline control valve to cut off the corresponding pipeline in time, effectively ensuring pipeline safety.

[0044] Furthermore, the parts not detailed in this application are the same as the prior art or are implemented using the prior art.

[0045] To sum up:

[0046] 1. Through the reasonable layout of the boron-doped pipeline, phosphorus-doped pipeline, boron-phosphorus co-doped pipeline, purge pipeline and inlet / outlet gas pipeline, and in coordination with the setting of the mass flow controller (MFC) and multiple pneumatic control valves, the overall structure of the present utility model is simple and easy to operate, and can efficiently and conveniently adjust the flow rates of the boron-doped pipeline and the phosphorus-doped pipeline to achieve precise control of the boron and phosphorus flow rates entering the glass liner in the optical fiber preform manufacturing process;

[0047] 2. The present utility model can effectively avoid pipeline contamination caused by gas leakage between each other, and is convenient for maintenance and repair, which can facilitate the operator to quickly troubleshoot problems. With the corresponding valve interlock protection measures, it can effectively ensure pipeline safety.

[0048] The above embodiments are only used to illustrate the design concept and characteristics of the present utility model, and their purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The protection scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design concepts disclosed by the present utility model are within the protection scope of the present utility model.

Claims

1. A control system arrangement structure for boron-phosphorus co-doping in optical fiber rod making, characterized in that: The invention comprises a boron raw material tank (1), a phosphorus raw material tank (2) and an electric control cabinet (19), wherein the boron raw material tank (1) and the phosphorus raw material tank (2) are respectively connected to the input ends of a boron-doped pipeline (10) and a phosphorus-doped pipeline (11), the output ends of the boron-doped pipeline (10) and the phosphorus-doped pipeline (11) are both connected to the input end of a boron-phosphorus co-doped pipeline (12), the output end of the boron-phosphorus co-doped pipeline (12) is connected to a glass liner of an optical fiber rod making process, and the boron-doped pipeline (10) is sequentially provided with a boron pipeline mass flow controller (3 ) and a boron-doped pipeline control valve (5); the phosphorus-doped pipeline (11) is provided with a phosphorus pipeline mass flow controller (4) and a phosphorus-doped pipeline control valve (6) in sequence; the boron-phosphorus co-doped pipeline (12) is provided with a boron-phosphorus co-doped pipeline control valve (7); the boron pipeline mass flow controller (3), the phosphorus pipeline mass flow controller (4), the boron-doped pipeline control valve (5), the phosphorus-doped pipeline control valve (6) and the boron-phosphorus co-doped pipeline control valve (7) are all electrically connected to a controller in the electric control cabinet (19) via a signal line.

2. A control system arrangement structure for boron-phosphorus co-doping in optical fiber rod making according to claim 1, characterized in that: The boron-doped pipeline (10), the phosphorus-doped pipeline (11) and the boron-phosphorus co-doped pipeline (12) are all installed with corresponding pipeline heating devices and temperature sensors. The pipeline heating device is specifically a heating resistance wire coated on the outside of the pipeline.

3. A control system arrangement structure for boron-phosphorus co-doping in optical fiber rod making according to claim 2, characterized in that: The boron-doped pipeline (10) is connected to the input end of a boron purge pipeline (13); and the phosphorus-doped pipeline (11) is connected to the input end of a phosphorus purge pipeline (14).

4. A control system arrangement structure for boron-phosphorus co-doping in optical fiber rod making according to claim 3, characterized in that: The boron purge pipeline (13) and the phosphorus purge pipeline (14) are respectively provided with a boron purge pipeline pneumatic valve (8) and a phosphorus purge pipeline pneumatic valve (9).

5. The control system arrangement structure for boron-phosphorus co-doping in optical fiber rod making according to claim 3, characterized in that: The air inlet ends of the boron raw material tank (1) and the phosphorus raw material tank (2) are respectively connected to an air inlet pipeline 1 (15) and an air inlet pipeline 2 (16), and the air inlet pipeline 1 (15) and the air inlet pipeline 2 (16) are respectively connected to carrier gas source devices corresponding to the boron vapor and the phosphorus vapor; The output ends of the boron purge pipeline (13) and the phosphorus purge pipeline (14) are respectively connected to the first gas outlet pipeline (17) and the second gas outlet pipeline (18), and the first gas outlet pipeline (17) and the second gas outlet pipeline (18) are both connected to the exhaust gas extraction device.

6. The control system arrangement structure for boron-phosphorus co-doping in optical fiber rod manufacturing according to claim 1, characterized in that: The boron-doped pipeline control valve (5), the phosphorus-doped pipeline control valve (6) and the boron-phosphorus co-doped pipeline control valve (7) are all normally closed valves.

7. A control system arrangement structure for boron-phosphorus co-doping in optical fiber rod manufacturing according to claim 4, characterized in that: The boron purge pipeline pneumatic valve (8) and the phosphorus purge pipeline pneumatic valve (9) are both normally open valves.

8. The control system arrangement structure for boron-phosphorus co-doping in optical fiber rod manufacturing according to claim 4, characterized in that: The boron purge pipeline pneumatic valve (8), the phosphorus purge pipeline pneumatic valve (9), the pipeline heating device and the temperature sensor are all electrically connected to the controller in the electric control cabinet (19).

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